François Charette seminar cancelled

The geometry seminar scheduled for Tuesday 24th November has been cancelled. The speaker would have been François Charette (Max Planck, Bonn). We hope to invite him to come another time. For interest, we keep his title and abstract here: Quantum Reidemeister torsion and open Gromov-Witten invariants.

Lagrangian Floer homology is a tool that gives information about Lagrangian submanifolds in symplectic topology. For example, it has been used to proved one of Arnold’s conjectures about existence (and lower bounds) of closed periodic orbits of the Hamiltonian flow. However, this homology often vanishes. In this talk, I will show how torsion of an acyclic chain complex can be used to extract information out of the Floer chain complex in this case. This will be interpreted as certain rational functions of open Gromov Witten invariants.

Address

Getting here

The department of mathematics is in building NO, on the Campus de la Plaine, of the Université libre de Bruxelles. The geometry group is on the 7th floor. This map shows NO, as well as the metro station Delta and the stop for the number 71 bus. The number 95 also stops a short walk from the department. See the STIB website for more information on public transport in Brussels.